1. Service requirements from 3GPP TS 22.101
Service requirements from 3GPP TS
SDO Emergency Services Coordination Workshop (ESW07)
Jefferson Building of the Library of Congress , Washington DC
April 10-12, 2007
Gary Jones – Director of Standards Policy
T-Mobile USA
Ericsson AB 2006

2. Topics 3GPP specifications General requirements
Topics
3GPP specifications
General requirements
Identification of emergency calls
Interaction with cellular protocols
Location of emergency calls
Ericsson AB 2006

3. 3GPP specifications IMS emergency is a Rel-7 work item
3GPP specifications
IMS emergency is a Rel-7 work item
Release 7 Functionally Frozen at the March 2007 Plenaries
Service requirements are specified in 3GPP TS
This presentation is an overview of IMS emergency call requirements in
The service requirements TS is already frozen (i.e. the functionality is there)
...but corrections and alignments are still possible
Architecture is specified in 3GPP TS
The TS is under version control, and corrections are still possible
Protocol details are in 3GPP TS
Ericsson AB 2006

4. General requirements Protocol support for emergency services is needed
General requirements
Protocol support for emergency services is needed
The speech service is required, multimedia is FFS (in later releases)
Routing to the appropriate service point according to national regulations
Emergency call without dialing a number must be possible
triggering e.g. by red “emergency” button or car airbag sensor
Terminal supporting voice services shall also support emergency speech calls
terminal must support emergency calls with as well as without SIM / USIM
support of emergency calls without SIM / USIM in the network is subject to national regulations
Push-to-talk is not considered a voice service in this respect
Ericsson AB 2006

5. Identification of emergency calls
Identification of emergency calls
The terminal detects emergency number
global default numbers 112 & 911 (even in terminal without SIM / USIM)
HPLMN can define additional e-numbers (but no IMS identifiers) on SIM / USIM
Serving network can download local e-numbers
Currently only 3GPP cellular protocols (CS + PS domain) support this requirement
Emergency call without dialing a number must be possible
triggering e.g. by red “emergency” button or car airbag sensor
Different emergency services need to be identified
Police, ambulance, fire brigade, marine guard, mountain rescue
Use of the subcategories is subject to national administration
The network must be able to detect emergency calls, but no specific requirements have been made on how this should happen
Ericsson AB 2006

6. Interaction with the cellular protocol
Interaction with the cellular protocol
CS + PS (IMS) capable mobile should give priority to CS emergency call
Local numbers downloaded by the serving network and HPLMN configured emergency numbers do apply also to IMS emergency call initiation
Emergency categories (police, ambulance, etc) do apply also in IMS
No means to configure local or HPLMN IMS emergency call identifiers is needed
The handling of dialled numbers versus dial-string may need further clarifications.
Ericsson AB 2006

7. Location of emergency calls
Location of emergency calls
Location of emergency calls must be supported, applicability is subject to national regulations
Locating emergency calls overrides subscribers privacy request
Based on local regulation, the network controls this privacy override, as long as the PSAP and the emergency service authorities need it
In some countries, the user may be allowed on an emergency call by call basis to restrict caller identifier and location delivery to the PSAP
Ericsson AB 2006

8.
Thank you
Ericsson AB 2006